Let the Makefile decide which include to use for .pde files
Let the Makefile decide which include to use for .pde files

Previously, the C preprocessor would pick either Arduino.h or WProgram.h
based on a define. Now, the Makefile makes the decision earlier. This
prevents having to duplicate the #if line in the next commit.

thomaskilian/Arduino-Makefile,AlexSatrapa/Arduino-Makefile,exmachina-dev/Arduino-Makefile,jamesrob4/Arduino-Makefile,harshavardhana/arduino-makefile,WeAreLeka/Arduino-Makefile,prpplague/Userspace-Arduino,exmachina-dev/Arduino-Makefile,tuna-f1sh/Arduino-Makefile,sudar/Arduino-Makefile,drpjk/Arduino-Makefile,WeAreLeka/Arduino-Makefile,kindsenior/Arduino-Makefile,bugobliterator/BUAGI,theicfire/Arduino-Makefile,sej7278/Arduino-Makefile,bugobliterator/BUAGI,sej7278/Arduino-Makefile,bugobliterator/BUAGI,marioaugustorama/Arduino-Makefile,sudar/Arduino-Makefile,prpplague/Userspace-Arduino,prpplague/Userspace-Arduino,kindsenior/Arduino-Makefile,AlexSatrapa/Arduino-Makefile,joshsamuelson/Arduino-Makefile,marioaugustorama/Arduino-Makefile,harshavardhana/arduino-makefile,bugobliterator/BUAGI,drpjk/Arduino-Makefile,joshsamuelson/Arduino-Makefile,tuna-f1sh/Arduino-Makefile,bugobliterator/BUAGI,jamesrob4/Arduino-Makefile,WeAreLeka/Arduino-Makefile,prpplague/Userspace-Arduino,drpjk/Arduino-Makefile,bugobliterator/BUAGI,thomaskilian/Arduino-Makefile,theicfire/Arduino-Makefile